NFL Rules Explained: The Complete Beginner’s Guide to American Football

American football can look complicated when you’re watching your first NFL game. Players running in different directions, yellow flags flying across the pitch, referees making hand signals and commentators shouting about third downs, red zones and two-minute warnings.

But here’s the good news: the basic rules of the NFL are much easier to understand than they first appear.

Once you understand how teams score points, what the four downs mean and how possession works, you’ll be able to follow most of the action. And feel free to also see our guide on soccer compared to NFL for the key differences between the two sports. And read our NFL positions explained for insight on the positions in NFL.

In this UK Rookie guide, we’ll explain the rules of American football in plain English, with examples that make sense to British sports fans.

NFL Rules at a Glance

Before we get into the details, here’s a quick introduction to how an NFL game works.

Rule	What you need to know
Players	11 players per team on the field
Game length	60 minutes of game-clock time
Quarters	Four quarters of 15 minutes
Main objective	Score more points than the opposition
Touchdown	6 points
Field goal	3 points
Extra point kick	1 point
Two-point conversion	2 points
Safety	2 points
Downs	Four attempts to gain 10 yards
Field	100 yards between goal lines, plus two 10-yard end zones
Possession	One team attacks while the other defends

The most important rule to remember is that the attacking team normally has four attempts to move the ball at least 10 yards.

Understand that, and much of the NFL suddenly starts to make sense!

What Is the Objective of American Football?

The objective is simple: score more points than your opponent.

Teams move the ball towards the opposition’s end zone by running with it or throwing forward passes.

The attacking team is called the offence, while the team trying to stop them is the defence.

Unlike football in the UK, where both teams constantly switch between attacking and defending with the same players, NFL teams use different groups of players for offence, defence and special teams.

The offence attempts to advance the ball downfield, while the defence tries to stop them, force mistakes or win possession.

How Do Downs Work in the NFL?

If you only learn one American football rule today, make it this one.

The offence gets four downs (attempts) to advance the ball at least 10 yards.

If they gain those 10 yards, they earn a new first down and another set of four attempts.

If they fail to gain the required distance after four downs, possession normally goes to the opposition at the spot where the final play ends.

Let’s look at an example.

Example: Understanding First and 10

Imagine the Kansas City Chiefs start with the ball at their own 30-yard line.

Play	What happens	Next situation
1st down	Run gains 4 yards	2nd & 6
2nd down	Pass gains 3 yards	3rd & 3
3rd down	Run gains 5 yards	New 1st & 10

The Chiefs have gained 12 yards in three plays, so they’ve moved beyond the required 10 yards.

They now receive another four downs to gain the next 10 yards.

This cycle continues as they move towards the end zone.

What Does 3rd and 7 Mean?

You’ll constantly hear commentators say things like:

• 1st and 10
• 2nd and 6
• 3rd and 7
• 4th and 1

The first number tells you which down the offence is on.

The second tells you how many yards they still need for a new first down.

So 3rd and 7 means it’s the team’s third attempt and they need another seven yards.

If they gain eight yards, they get a new first down. If they gain only three, they face 4th and 4.

Why Do Teams Punt on Fourth Down?

Most teams don’t attempt to gain the remaining yards on fourth down unless they’re close enough, need to take a risk or have a favourable situation.

Instead, they often punt the ball downfield.

A punt is a kick designed to give the opposition possession much further away from the punting team’s end zone.

Teams can also attempt a field goal if they’re within realistic kicking distance.

This is one of the biggest strategic differences between American football and football in the UK.

How Do Teams Score Points in the NFL?

There are several ways to score in American football.

Touchdown — 6 Points

A touchdown is worth six points.

It happens when a player legally possesses the ball in the opposition’s end zone, or carries the ball across the goal line while meeting the rules for possession.

Touchdowns can be scored through running plays, passing plays, interceptions, fumble recoveries and certain returns.

After scoring, the team gets an opportunity to add extra points.

Extra Point — 1 Point

Following a touchdown, the scoring team can attempt a kick through the goalposts.

A successful kick adds one point, taking the total from six to seven.

Two-Point Conversion — 2 Points

Instead of kicking for one point, a team can attempt another offensive play from near the goal line.

If they successfully reach the end zone, they score two additional points.

This makes a touchdown and successful two-point conversion worth eight points.

Field Goal — 3 Points

A field goal is worth three points.

Teams score by kicking the ball through the uprights and above the crossbar.

Field goals are often attempted on fourth down when a team is close enough to the opposition’s goalposts.

Safety — 2 Points

A safety usually occurs when the offence is responsible for the ball becoming dead in its own end zone, such as when a quarterback is tackled there while holding the ball.

The defence receives two points, and the team that conceded the safety must then put the ball back into play with a free kick.

NFL Scoring Summary

Scoring method	Points
Touchdown	6
Extra point kick	1
Two-point conversion	2
Field goal	3
Safety	2

There are also rare scoring situations, including defensive returns during conversion attempts.

How Long Is an NFL Game?

An NFL game consists of four 15-minute quarters, giving 60 minutes of regulation game-clock time.

However, watching a full NFL game usually takes around three hours.

That’s because the clock frequently stops between plays.

The game also includes television breaks, timeouts, injury stoppages, reviews and a longer halftime break.

When Does the Clock Stop?

The game clock can stop for several reasons, including:

• Incomplete forward passes.
• A player going out of bounds in situations covered by the clock rules.
• Team timeouts.
• Certain penalties.
• Scores and changes of possession.
• The two-minute warning in the second and fourth quarters.

Not every play stops the clock.

For example, when a player is tackled inbounds, the game clock will normally continue running.

What Is the Play Clock?

The play clock is different from the game clock.

It determines how long the offence has to start its next play.

It’s generally 40 seconds between plays, although certain situations use a 25-second play clock.

If the offence fails to snap the ball before the play clock expires, it can be penalised for delay of game.

How Does an NFL Game Start?

Games begin with a coin toss, where the winning team chooses from options including whether to kick or receive, which goal to defend, or whether to defer its choice until the second half.

Play begins with a kickoff.

The receiving team then attempts to return the ball, or takes possession according to the applicable kickoff and touchback rules.

The NFL has introduced significant changes to kickoffs in recent seasons, so the exact positioning and touchback rules are different from older NFL footage.

After the opening possession, the teams take turns attacking and defending as possession changes.

How Do NFL Teams Move the Ball?

Offences have two main ways of gaining yards: running and passing.

Running Plays

A running play usually involves the quarterback handing the ball to a running back, who tries to find a gap in the defence.

Running plays are useful for gaining shorter distances, controlling possession and keeping the game clock moving.

Quarterbacks and other eligible players can also run with the ball.

Passing Plays

Passing plays involve the quarterback throwing the ball towards an eligible receiver.

A completed pass can gain significant yardage and is often used when the offence needs to move quickly.

However, passing also carries risks.

An incomplete pass gains no yards, while a pass intercepted by the defence results in a turnover.

An offence is generally permitted one forward pass per down, and it must be thrown from behind the line of scrimmage.

What Is the Line of Scrimmage?

The line of scrimmage is the imaginary line running across the field through the ball’s position before a play begins.

The offence lines up on one side, while the defence lines up on the other.

The play starts when the centre snaps the ball, normally to the quarterback.

Players must follow specific formation and movement rules before the snap.

For example, the offence must have at least seven players on its line of scrimmage at the snap.

You’ll often hear commentators discuss teams winning or losing the battle at the line of scrimmage.

That usually means one team’s offensive or defensive line is physically dominating the other.

What Is a Turnover in the NFL?

A turnover happens when possession changes because the offence loses the ball to the defence.

There are two main types.

Interception

An interception occurs when a defensive player catches a legal forward pass thrown by the opposition.

The defender can then attempt to return the ball, potentially even scoring a touchdown.

Fumble

A fumble occurs when a player loses possession of the ball before being ruled down or before the play is otherwise dead.

If the opposition legally recovers the live ball, possession changes.

Turnovers are hugely important because they can completely change the momentum of a game.

A team dominating possession can suddenly find itself defending deep inside its own half after a mistake.

What Are the Most Common NFL Penalties?

NFL referees throw yellow flags to indicate potential rule violations.

Penalties can cost a team yards, repeat a down, award an automatic first down or, in some cases, cause a loss of down.

Here are some of the most common penalties beginners should recognise.

Penalty	What it means	Typical consequence
False start	Offensive player moves illegally before the snap	5 yards
Offside	Defensive player is illegally positioned when the ball is snapped	5 yards
Holding	Player illegally restricts an opponent	Often 10 yards on offence; 5 yards and automatic first down for defensive holding
Pass interference	Illegal contact prevents a fair opportunity to catch a pass	Depends on whether offence or defence commits it
Delay of game	Offence fails to snap the ball in time	5 yards
Unnecessary roughness	Illegal excessive contact	Usually 15 yards

One important distinction is that defensive pass interference generally results in the ball being placed at the spot of the foul, subject to specific exceptions, while offensive pass interference usually results in a 10-yard penalty.

You don’t need to memorise every penalty immediately.

You’ll learn the most common ones simply by watching games.

What Is the Red Zone in American Football?

The red zone is the area between the opposition’s 20-yard line and its goal line.

When a team enters the red zone, it’s within 20 yards of scoring a touchdown.

You’ll frequently hear commentators discussing red-zone efficiency.

This measures how successfully teams convert opportunities inside the opposition’s 20-yard line into touchdowns.

For example, if a team enters the red zone four times and scores three touchdowns, its red-zone touchdown percentage is 75%.

Strong red-zone performance can make the difference between winning and losing close games.

What Is a Sack in the NFL?

A sack occurs when the quarterback is tackled behind the line of scrimmage on a passing play before releasing the ball, subject to the official scoring rules.

Sacks are important because they usually result in a loss of yards.

For example, a team facing 2nd and 5 might suddenly find itself facing 3rd and 13 after an eight-yard sack.

Some of the NFL’s most dominant defenders specialise in pressuring and sacking quarterbacks.

What Happens If an NFL Game Ends in a Tie?

If the score is level after four quarters, the game goes into overtime.

The rules depend on whether it’s a regular-season game or a playoff game.

Regular-Season Overtime

Under the rules introduced for the 2025 season, both teams normally have an opportunity to possess the ball, even if the team receiving the opening possession scores a touchdown.

Regular-season overtime lasts a maximum of 10 minutes.

If the score remains tied when overtime ends, the game can finish as a draw.

Playoff Overtime

Playoff games cannot end in a tie.

Both teams have an opportunity to possess the ball under the postseason overtime rules, and play continues through additional overtime periods if necessary until a winner is determined.

How Many Players Are on an NFL Team?

Each team has 11 players on the field at a time.

However, NFL teams have much larger squads because different players specialise in different roles.

The three main units are:

Offence: The players trying to move the ball and score.

Defence: The players trying to stop the opposition and regain possession.

Special teams: Players responsible for kickoffs, punts, field goals and returns.

Some of the most recognisable positions include:

• Quarterback (QB): Directs the offence and usually throws the passes.
• Running back (RB): Primarily carries the ball on rushing plays.
• Wide receiver (WR): Runs routes and catches passes.
• Tight end (TE): Combines receiving and blocking responsibilities.
• Linebacker (LB): Helps defend against running and passing plays.
• Cornerback (CB): Often covers opposition receivers.
• Safety (S): Provides deeper defensive coverage and run support.
• Kicker (K): Attempts field goals, extra points and sometimes kickoffs.

We’ll cover every position in greater detail in our dedicated NFL Positions Explained guide.

How Does the NFL Season Work?

The NFL consists of 32 teams divided into two conferences: the AFC and NFC.

Each conference has four divisions containing four teams.

Every team plays 17 regular-season games across an 18-week schedule, with one bye week.

At the end of the regular season, seven teams from each conference qualify for the playoffs.

These include the four division winners and three wildcard teams.

The playoffs are single-elimination games, meaning the losing team is knocked out.

The AFC and NFC champions eventually meet in the Super Bowl to decide the NFL champion.

NFL Rules Explained: Frequently Asked Questions

Why does American football stop so much?

NFL games are built around individual plays rather than continuous action. Teams reset formations, choose tactics and substitute players between plays. Clock stoppages, penalties, reviews and commercial breaks also contribute.

Can you pass backwards in American football?

Yes. Backward passes are permitted, including beyond the line of scrimmage. Unlike an incomplete forward pass, a backward pass that hits the ground can remain live and be recovered by either team.

Can the quarterback run with the ball?

Yes. Quarterbacks can carry the ball themselves, either on designed running plays or when they decide to scramble after a passing play breaks down.

What happens on fourth down?

The offence can attempt to gain the remaining yards, punt the ball or try a field goal. If it attempts a normal offensive play and fails to gain a new first down, the opposition generally takes possession.

Why is a touchdown worth six points?

Six points is the established value of a touchdown under modern American football rules. The scoring team then has the chance to add one or two additional points.

What does first and goal mean?

First and goal means the offence has a new set of downs, but the distance to the opposition’s goal line is shorter than the usual 10 yards, or the goal line is otherwise the line to gain. The team must score to earn a touchdown rather than gain another ordinary first down.

Is the NFL difficult to understand?

Not once you’ve learned the basics. Focus first on downs, scoring and possession. The more complicated penalties, formations and tactical decisions become easier to understand as you watch.

Final Thoughts: Start Watching the NFL

American football might initially seem complicated, but the basic rules are straightforward.

Teams have four downs to gain 10 yards, they move the ball by running or passing, and they score by reaching the end zone or kicking field goals.

Everything else builds on those fundamentals.

The best way to learn is to watch a game and follow the down-and-distance information displayed on screen.

Before long, you’ll find yourself recognising formations, understanding fourth-down decisions and wondering why a coach didn’t go for two points.

And if you’re completely new to the sport, UK Rookie is here to help you get started.

Next steps: Discover which NFL team you should support with our UK Rookie Team Picker, explore our beginner’s guides and find out how to watch NFL games live in the UK.